Update virtual-nodes-portal.md

Add missing RegistrationPolicy column to the output of "az provider list"

Author: nathanweeks

articles/aks/virtual-nodes-portal.md

@@ -28,9 +28,9 @@ az provider list --query "[?contains(namespace,'Microsoft.ContainerInstance')]"
 The *Microsoft.ContainerInstance* provider should report as *Registered*, as shown in the following example output:
 
 ```
-Namespace                    RegistrationState
----------------------------  -------------------
-Microsoft.ContainerInstance  Registered
+Namespace                    RegistrationState    RegistrationPolicy
+---------------------------  -------------------  --------------------
+Microsoft.ContainerInstance  Registered           RegistrationRequired
 ```
 
 If the provider shows as *NotRegistered*, register the provider using the [az provider register][az-provider-register] as shown in the following example:
@@ -241,4 +241,4 @@ Virtual nodes are one component of a scaling solution in AKS. For more informati
 [aks-hpa]: tutorial-kubernetes-scale.md
 [aks-cluster-autoscaler]: cluster-autoscaler.md
 [aks-basic-ingress]: ingress-basic.md
-[az-provider-list]: /cli/azure/provider#az-provider-list
+[az-provider-list]: /cli/azure/provider#az-provider-list